I think a lot of people unfairly judged it when it came out. Part of that had to do with Bono and Edge being involved (let's face it, a lot of people love to hate on U2, for whatever reason) and part of that had to do with the numerous initial problems with the play (all the injuries). Thing is, this play was a pretty ambitious attempt on their part and initially, it didn't look like that attempt would pay off. However, now that things have been ironed out, the play is getting good reviews (for the most part) and is raking in the cash.
Do people owe TOTD an apology? Maybe for judging it so quickly, but not because it's the greatest thing on Broadway. As I understand it, it's not a great play. An entertaining one, sure. And like someone else said, just 'cause something's popular, it doesn't make it good (just look at Nickelback for an example of this).
Still, I'm itching to go to NY and see TOTD. Hopefully this year or next.